off-and-on vs interrupted

off-and-on and interrupted both are adjectives.

Word	Noun	Adjective	Verb	Adverb
off-and-on	No	Yes	No	No
interrupted	No	Yes	No	No

As adjectives, off-and-on and interrupted are synonyms defined as:

Other synonyms of off-and-on include fitful.

off-and-on (adjective)	interrupted (adjective)
intermittently stopping and starting	intermittently stopping and starting
	discontinued temporarily